PHP表单-如何隐藏未填写的内容表单选项

我目前正在为我工作的一家公司制作一个简单的PHP联系人表单。它包括一些复选框和一些文本区域，这是php代码

   <?php

function getPost($name){
return ( isset($_POST[$name])? $_POST[$name] : '');
}

$name = $_POST['name'];
$email = $_POST['email'];
$email2 = $_POST['email2'];
$landline = $_POST['landline'];
$mobile = $_POST['mobile'];
$pclandline = getPost('pclandline');
$pcmobile = getPost('pcmobile');
$pcemail = getPost('pcemail');
$zptf = getPost('zptf');
$zpf = getPost('zpf');
$zpsf = getPost('zpsf');
$opz = getPost('opz');
$opfg = getPost('opfg');
$opfs = getPost('opfs');
$tpz = getPost('tpz');
$tpf= getPost('tpf');
$zpfoct= getPost('zpfoct');
$opzoct= getPost('opzoct');
$zptfquan = $_POST['zptfquan'];
$zpfquan = $_POST['zpfquan'];
$zpsfquan = $_POST['zpsfquan'];
$opzquan = $_POST['opzquan'];
$opfgquan = $_POST['opfgquan'];
$opfsquan = $_POST['opfsquan'];
$tpzquan = $_POST['tpzquan'];
$tpfquan = $_POST['tpfquan'];
$zpfoctquan = $_POST['zpfoctquan'];
$opzoctquan = $_POST['opzoctquan'];
$promo = $_POST['promo'];
$message = $_POST['message'];
$formcontent=" From: $name \n Email : $email \n Confirm Email : $email2 \n Landline: $landline \n Mobile: $mobile \n PC Landline: $pclandline \n PC Mobile: $pcmobile \n PC Email: $pcemail \n \n 0.25l: $zptf \n 0.25l Quantity: $zptfquan \n 0.5l: $zpf \n 0.5l Quantity: $zpfquan \n 0.75l: $zpsf \n 0.75l Quantity: $zpsfquan \n 1.0l: $opz \n 1.0l Quantity: $opzquan \n 1.5lg: $opfg \n 1.5lg Quantity: $opfgquan \n 1.5ls: $opfs \n 1.5ls Quantity: $opfsquan \n 2.0l: $tpz \n 2.0l Quantity: $tpzquan \n 2.5l: $tpf \n 2.5l Quantity: $tpfquan \n 0.5l Octime: $zpfoct \n 0.5l Octime Quantity: $zpfoctquan \n 1.0l Octime: $opzoct \n 1.0l Octime Quantity: $opzoctquan \n Promotional Code: $promo \n Message: $message";
$recipient = "replaced email";
$subject = "Glass Sweet Jars Quote";
$mailheader = "From: $email \r\n";
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
echo "Thank you! We will contact you as soon as possible with your quote" . " -" . "<a href='index.html'>Return Home</a>";
?>

我的问题是，当我收到电子邮件时，它会列出表单上的所有内容，无论用户是否已签入或写入表单，这使得挑选相关数据非常耗时，是否有任何方法可以隐藏用户在该特定电子邮件中未填写的任何区域

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提前谢谢

如果未设置变量，则不要将其添加到$formcontent…

用于检查变量是否已设置和填充。。如果为true，则添加到表单变量中，否则忽略

$formcontent = "";
$formcontent .= !empty($email)? "Email : {$email}<br />" : "";
$formcontent .= !empty($confirmemail)? "Confirm Email : {$confirmemail}<br />" : "";